A part of an mrna has the base sequence gca. which change to this sequence would indicate a missense mutation?

A part of an mrna has the base sequence gca. which change to this sequence would indicate a missense mutation?
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A missense mutation is the change in a single nucleotide that results in a different amino acid being coded for. GCA codes for the amino acid Alanine. Therefore any of the following changes would be missense mutations: GAA -> Glutamic acid GUA -> Valine GGA -> Glycine CCA -> Proline UCA -> Serine ACA -> Threonine
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